shirley knott, a 65kg astronaut holds a 12kg tank of oxygen, which she throws backwards at 2.2m/s. with what speed does she move?
Answers
This question involves the concepts of the law of conservation of momentum and speed.
She moves with a speed of "0.41 m/s".
Applying the law of conservation of momentum to this situation, we get:
\(m_1u_1+m_2u_2=m_1v_1+m_2v_2\)
where,
m₁ = mass of shirley = 65 kg
m₂ = mass of tank = 12 kg
u₁ = initial speed of shirley = 0 m/s
u₂ = initial speed of tank = 0 m/s
v₁ = final speed of shirley = ?
v₂ = final speed of tank = 2.2 m/s
Therefore,
\((65\ kg)(0\ m/s)+(12\ kg)(0\ m/s)=(65\ kg)(v_1)+(12\ kg)(2.2\ m/s)\\\\v_1=\frac{-26.4\ kg.m/s}{65\ kg}\\\\v_1=-0.41\ m/s\)
negative sign shows the opposite direction.
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Related Questions
what matches ????????????????
Answers
Answer:
1st: Radiation
2nd: Conduction
3rd: Convection
Explanation:
I actually learned this before in school. Yay
What is the velocity of a toy car that rolls 350 cm towards a wall in 4.8 seconds?
A. 0.73 cm/s towards the wall
B. 1,680 cm/s towards the wall
C. 354.8 cm/s towards the wal
l D. 72.9 cm/s towards the wall
Answers
Answer:
D. 72.9 cm/s towards the wall
50 POINTS!
Write a paragraph that answers the questions below:
If there is a situation that would require a person to use self defense, what offensive strategies would you recommend they use?
What defensive strategies would you recommend they use?
Based on the videos, which move(s) look most effective for offense if there is a situation that would need self defense?
Based on the videos, which move(s) look most effective for defense if there is a situation that would need self defense?
Answers
If a person is forced to utilize self-defense, the offensive techniques that should be recommended are as follows:
Take the initiative.I would advise them to employ the following defense strategies:
Keeping your head safeKeeping your elbow between you and the evil person.Based on the films, the move(s) that appear to be the most successful for the offense in a circumstance requiring self-defense are to target the problem rather than the person.
What is an offensive strategy?An aggressive competitive strategy is a form of company strategy that involves actively pursuing industry changes.
Companies that go on the offensive typically make acquisitions and invest extensively in R&D and technology in order to remain ahead of the competition.
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I-ready dianostic: in passage 2, which plot event best supports the theme that things are not always what they seem?
Answers
The specific plot event in Passage 2 that best supports the theme that things are not always what they seem is not specified.
Which plot event in Passage 2 exemplifies the theme of deceptive appearances?Without knowledge of the specific plot events in Passage 2, it is not possible to identify the particular event that best supports the theme that things are not always what they seem.
To provide a comprehensive answer, it would be necessary to have access to Passage 2 and analyze the various plot events within it. Only by closely examining the plot events and their depiction of deceptive appearances can we identify the most relevant event that aligns with the theme.
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How did Einstein’s and Newton’s theories differ in terms of explaining the cause of gravity?
Answers
Newton's law of universal gravitation doesn't say anything about the cause of gravity.
Einstein's theory of relativity does.
What happens to the energy of a wave if the amplitude is doubled?
Answers
Explanation if you’d like:
The energy transported by a wave is directly proportional to the square of the amplitude so. whatever change occurs in the amp, the square that affect infects energy. This means the doubling of the amplitude results in a quadrupling of the energy
A sprinter runs a 100 m dash in 12.0 s. She starts from rest with a constant acceleration ax for 2.0 s and then runs with constant speed for the remainder of the race.
Answers
the value of ax, given the data from the question is 4.55 m/s²
Data obtained from the questonFrom the question given above, the following data were obtained:
Total distance travelled = 100 mTotal time = 12 sTime for acceleration (t) = 2Acceleration (a) = ax =?How to determine the distance travelled in the first 2 sInitial velocity = 0 m/sAcceleration (a) = axTime (t) = 2 sDistance (s) for the first 2 s = ?s = ½at²
s = ½ × ax × 2²
s = 2ax
How to determine the velocity in the first 2 sAcceleration (a) = axTime for acceleration (t) = 2 sVelocity for the first 2 s (v) = ?v = at
v = ax × 2
v = 2ax
How to determine the value of axRemaining distance = velocity × remaining time
Remaining time = 12 - 2 = 10
Remaining distance = 2ax × 10
Remaining distance = 20ax
Total distance = Distance for first 2 s + Remainng distance
100 = 2ax + 20ax
100 = 22ax
Divide both sides by 22
ax = 100 / 22
ax = 4.55 m/s²
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what are two properties that lead to electromagnetic interactions? pls help I'm so confused and cant find the answer anywhere!!
Answers
Answer:
Electric charge. A fundamental property that leads to the electromagnetic interactions among particles that make up matter.
Which of the following is the keyboard shortcut for saving a document?
O Control V
O Control S
O Control A
O Control E
Answers
good luck :)))
Answer:Control S, Command S on MAC=Save
Two cyclists leave towns 120km apart at the same time and travel toward each other. One cyclist travels 6/kmh faster than the other. If they meet in 3 hours, what is the rate of each cyclist?
Answers
One cyclist is cycling at a speed of 17 km/hr while the other is cycling at a speed of 23 km/hr.
Let's denote the rate of the slower cyclist as "r" km/h. Then the rate of the faster cyclist is "r+6" km/h.
When they are cycling toward each other, their relative speed is the sum of their speeds. Therefore, we can set up the equation:
\(120 \ km = (r + r+6) \ km/h \times 3\) hours (since together they both travel a total distance of 120 km)
Simplifying this equation:
\(120 \ km = (2r + 6)\ km/h \times 3 \ hours\)
\(40 \ km = (2r + 6) \ km/h\)
\(2r + 6 = 40 \ km/h\)
\(2r = 34 \ km/h\)
\(r = 17 \ km/h\)
So the slower cyclist is cycling at 17 km/h and the faster cyclist is cycling at 17+6=23 km/h.
Therefore, the speeds of cyclists are 17 km/h and 23 km/h.
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Bethany feels as though she cannot enjoy flowers properly, as she has lost her sense of smell. Bethany has _______
Answers
Answer: Anthophobia
Explanation: A fear of flowers
Answer: Anosmia. It is the loss of smell.
The electromagnetic waves used in a microwave ovens has a frequency of 2540000000 Hz. The speed of the waves is 300000000 m/s. What is their wavelength?
Answers
Answer:
The wavelength of the waves is approximately 0.12 m.
Explanation:
An electromagnetic waves are generated as a result of the interaction between electric and magnetic fields. They do not require material medium for their propagation, and travel at the same speed (i.e the speed of light).
The speed, frequency and wavelength of a wave are related by:
speed = frequency x wavelength
wavelength = \(\frac{speed}{frequency}\)
Given: speed of the wave = 3 x \(10^{8}\), frequency = 2.54 x \(10^{9}\).
Thus,
wavelength = \(\frac{300000000}{2540000000}\)
= 0.11811
≅ 0.12
wavelength ≅ 0.12 m
Therefore, the wavelength of the waves is 0.12 m.
Is it possible to calculate the torque acting on rigid body without specifying the axis?
Answers
Yes, it is possible to calculate the torque acting on a rigid body without specifying the axis. Torque is a measure of the rotational force acting on an object, and it is calculated as the product of the force applied and the perpendicular distance from the axis of rotation.
The direction of the torque depends on the direction of the force and the direction of rotation. To calculate the torque without specifying the axis, you would need to know the force applied and the perpendicular distance from any point on the body to the line of action of the force. By using the right-hand rule, you can determine the direction of the torque. It's important to note that specifying the axis of rotation can help in determining the net torque or the total torque acting on a body in a system involving multiple forces.
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Ms. Lachance has to pick up her daughter from the airport and is running late. As she pulls her car out of the driveway and starts to drive down the road, she takes off as fast as her car will go. When she does this her coffee cup, which she left on the hood by accident flies into the windshield making it hard for her to see. Using Newton’s first law, explain why the coffee spilt all over the windshield.
Answers
Answer:
the gravity was pulling the cup to the front of the window even though the wind was pushing it the other way.
Explanation: the gravity must be strong
By using the Newton's first law of Motion, it can be explained why the coffee spilt all over the windshield. This is because there is gravitational force which acts upon it and it pushes the substances in the downward direction towards the Earth.
What is Newton's first law of motion?
Newton's first law of Motion states that a body remains in the same state of rest or uniform motion in a straight line unless and until an external force is applied on it. This means that a body will not start moving by itself until and unless an external force acts on it.
In this case, lachance's daughter is trying to pick her coffee cup, the coffee cup at the windshield is spilt which makes it difficult for her to see. This is because, there is the gravitational force or gravity which is pulling the coffee cup to the front of the window even though the wind was pushing it in the other way.
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6. Abdul moves a magnetic toy train away from a magnet that cannot move. What happens to the
potential energy in the system of magnets during the movement?
a
The potential energy decreases because the train moves in the same direction as the
magnetic force.
b
The potential energy decreases because the train moves against the magnetic force.
С
The potential energy increases because the train moves against the magnetic force.
d
The potential energy does not change because the magnets in the system do not change.
Yeah
Answers
Answer: Potential energy increases because the train moves against the magnetic force.
Explanation:
When the magnetic toy train is moved away from a magnet that cannot move, the potential energy in the system of magnets during the movement is affected as there's an increase in the potential energy because the train moves against the magnetic force.
We should note that the potential energy simply means the energy that is stored in the magnetic toy. Since the magnetic toy has been moved away from the magnet, the likelihood of its attraction will reduce thereby there'll be a rise in the potential energy.
The notion that individuals have the right to use lethal force against individuals who enter their home is an example of the influence of?
Answers
An illustration of the impact of Frontier justice is the idea that people have the right to use fatal force against others who enter their house.
What is Frontier justice?
Frontier justice is administrative retribution that is driven by the absence of rule and regulation or discontent with the administration of justice.A biased judge can also be described using this Frontier justice.Frontier justice is characterized by practices like lynching, vigilantism, and gunfighting.Like Frontier justice there is another law, named castle doctrine, also referred to as a castle law or a defense of habitation law, which is a constitutional principle that defines a person's home or any other legally occupied location as a place in which that individual has protections and immunities, allowing one, in certain situations, to use force to safeguard oneself against an attacker, free from criminal action for the consequences.Learn more about justice here:
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A 16-year-old employee working for Southern Virginia College's (SVC) bookstore during the summer months is helping prepare for Fall sales. It's a good way to make extra money, and the teen is saving for a car.
Books from one supplier are shipped to the SVC bookstore in large crates equipped with rope handles on all sides. On one occasion, the teen momentarily pulled with a force of 713 N at an angle of 35.8° above the horizontal to accelerate a 114-kg crate of books. The coefficient of friction between the crates and the vinyl floor is 0.541.
Determine the acceleration experienced by the crate in m/s2. Use the approximation g ≈ 10 m/s2.
Answer: ___________ m/s2 (rounded to the hundredths or thousandths place)
Answers
The acceleration experienced by the crate is approximately 0.844 m/s
How to solve for the accelerationWeight of the crate:
Weight = mass × acceleration due to gravity
Weight = 114 kg × 10 m/s^2
Weight = 1140 N
Force of friction:
Force of Friction = coefficient of friction × normal force
Force of Friction = 0.541 × 1140 N
Force of Friction ≈ 616.74 N
Net force:
Net Force = Applied Force - Force of Friction
Net Force = 713 N - 616.74 N
Net Force ≈ 96.26 N
Acceleration:
Acceleration = Net Force / mass
Acceleration = 96.26 N / 114 kg
Acceleration ≈ 0.844 m/s
Therefore, the acceleration experienced by the crate is approximately 0.844 m/s
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What is the meaning of “Eg” in physical science
Answers
Answer:
e.g. means "for example" but is physics is also stands for gravitational potential energy
You have two forces, 114.6 N and 70.7 N. What is their resultant (magnitude) if the first acts upward and the second acts downward? What is the direction of the resultant? What is their resultant (magnitude) if they both act downward? What is the direction of this resultant?
Answers
Hi there!
If they are in opposite direction:
- Let UP be the POSITIVE direction and DOWN be the NEGATIVE direction.
Thus:
∑F = 114.6 - 70.7 = 43.9 N upward
If they are in the SAME, downward direction:
∑F = -114.6 - 70.7 = -185.3
The magnitude is the absolute value, so:
|-185.3| = 185.3 N downward
A high speed train travels at 300 km/h. how long would it take in hours to travel 1,500 km at this speed?
Answers
To solve the problem, we can use the formula:
time = distance ÷ speed
where distance is in kilometers and speed is in kilometers per hour.
Plugging in the given values, we get:
time = 1500 km ÷ 300 km/h
time = 5 hours
Therefore, it would take 5 hours for the high speed train to travel 1,500 km at 300 km/h.
What is distance?
Distance refers to the amount of space between two objects or points, typically measured in units such as meters, kilometers, miles, or feet. It is a scalar quantity that only has magnitude, meaning it does not have a direction associated with it. Distance can be calculated by measuring the length of a straight line connecting two points, or by using other methods such as GPS or radar. It is an important concept in physics, particularly in the study of motion and velocity.To know more about distance, click the link given below:
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Quinn is testing the motion of two projectiles x and y by shooting them from a sling shot. What can we say best describes the motion of the projectiles ? Assume air resistance is not a factor
Answers
Explanation:
A projectile motion may be defined as that form of a motion that is experienced by an object or a particle which is projected near the surface of the Earth and the particle moves along the curved path subjected to gravity force only.
Thus a projectile motion is always acted upon by a constant acceleration due to gravity in the down ward direction.
In the context, Quinn shoots two particle x and y from his sling shot and he observes that both his projectiles travels in a parabola curve in the air. Both the object x and y touches the ground a distance apart from him which is known as the range and it depends upon the velocity of the projectile. Both the projectile reaches a maximum height and then drop on the ground in a parabola shape.
B. The vertical velocity of projectile Y is changing, and the horizontal velocity of projectile X is constant.
What is a carrier wave?
O a wave used to heat up and cook food
a wave that transmits speech, music, and other signals
a wave used to heat up and cook food
O a wave that reflects off bone in an x-ray
Answers
Answer:
A wave that transmits speech, music, and other signals
Explanation:
Hope it helps
(Give a thank OR mark as brainliest if it's the right answer)
Answer:
a wave that transmits speech, music, and other signals :)
Explanation:
When you eat food _ regulate the chemical reactions within your body that turn food into nutrients
Answers
Answer:
Enzymes
Explanation:
Enzymes are biological catalysts, which regulate various chemical reactions in the body.
The biochemical reactions involved in the digestion of food are regulated by enzymes. These biochemical reaction converts food into nutrients that are useful to the body.
For instance, the enzyme amylase catalyses the hydrolysis of starch into sugars.
how do you feed a dog medicine
Answers
There are lots more but these are the best
the arrangement of tubes in nancy holt’s sun tunnels creates a viewing experience much like a microscope. telescope. camera lens. kaleidoscope.
Answers
The arrangement of tubes in Nancy Holt's Sun Tunnels creates a viewing experience much like a camera lens.
Nancy Holt's Sun Tunnels is a sculpture that was constructed in 1973-1976. The sculpture is made up of four large concrete tubes, each 18 feet long and 9 feet in diameter, placed in an open desert in Utah. The sculpture is arranged in such a way that it allows the viewer to experience the natural environment through the lens of the concrete tubes.In the sculpture, the tubes are arranged in such a way that they frame the landscape and create a sort of tunnel for the viewer to look through. When viewed from inside the tunnels, the viewer is able to see the landscape outside in a way that is similar to looking through a camera lens.The Sun Tunnels can be seen as a large camera obscura, which is an ancient optical device that is essentially a large box with a pinhole in one side. The light that enters the box is projected onto the opposite wall and creates an upside-down image of the outside world. Similarly, the tubes in the Sun Tunnels act as a pinhole and allow light to pass through in a way that creates an image of the outside world when viewed from inside the tunnels.
Therefore, the arrangement of tubes in Nancy Holt's Sun Tunnels creates a viewing experience much like a camera lens.
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Think about what you already know. Why might two objects be affected differently if the same strength force is exerted on them?
Answers
Answer:Explanation:
If the same strength force is exerted on two objects, but the objects have the different masses, the object with less mass will have a greater change in velocity. ... Forces affect motion because they can change an objects motion.
The reason for two objects being impacted differently even a similar strength of the force is applied/exerted to them:
- Two objects might be affected differently on the application of a force of the same strength owing to the difference in their masses.
The second law of motion by Newton states that the rate of change of momentum of an object is directly proportional to the applied unbalanced force in the direction of the force.However, We know, Momentum = Mass × velocity.Hence, if the masses are different and the force applied is the same, the two objects will move with different velocities.
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An object starts at position -2m with an initial velocity of -4 m/s and a constant acceleration of +3 m/s^2.
a. In which direction is the object traveling initially?
b. What will be the object's velocity after 1s, 2s, 3s?
c. What will the objects position be after 3s?
Answers
Answer:
here is the answer
Explanation:
a) since displacement is given as a negative value, object must travelling i the negative direction (with respect to a cartesian plane).
b) after 1 second
v = u + at
v = -4 + 3× 1
v = -4 + 3
v = -1 m/s
after 2 seconds
v = -4 + 3×2
v = -4 + 6
v = 2 m/s
after 3 seconds
v = -4 + 3×3
v = -4 + 9
v = 5 m/s
c) we need to find the position after three seconds
initial velocity= u= -4m/s
final velocity = v= 5 m/s ( as previously calculated)
acceleration=3m/s²
s = ut + 1/2 × at²
s = -4×3 + 1/2 × 3×(3)²
s = -12 + 1/2 × 27
s = -12 + 27/2
s = 1.5 meters ( in the positive direction; as time has increased and acceleration in positive)
position = -2 + 1.5 = -0.5 meters
(s indicates distance travelled)
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A bus slows from 40 m/s to a stop in 8 seconds. How far does it travel while braking?
Answers
Answer:
320 m/s
Explanation:
40 miles per second and 8 seconds makes 40 times 8
1. What is the pull that all objects exert on each other?
2. What is a push or pull that acts on an object?
3. Can objects going in different directions at the same speed have the same velocity? Why or why not?
4. If 1 car is going faster than another traveling in the same direction, can they have the same velocity? Why or why
not?
5. Explain the last part of the 3rd Law, for every action there is...?
6. 1st Law- an object at rest will remain at rest unless...?
7. If 2 objects are exerting a force on each other and theydon't move, the forces must be...?
Answers
Answer:
Im pretty sure 1 is gravity, 2 is force
Explanation:
Is a bird that shifts direction demonstrating acceleration
Answers
Yes, a bird that shifts direction is demonstrating acceleration.
What is acceleration of an object?Acceleration is defined as the rate at which an object changes its velocity over time, and changing direction is a form of acceleration because it involves a change in velocity. When a bird changes direction, it must first decelerate in the original direction and then accelerate in the new direction, even if the speed remains constant. This change in velocity constitutes acceleration, which is a fundamental concept in physics.
Mathematically, the formula for acceleration is given as;
a = Δv/Δt
where;
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